This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-b2evolution-12.1-squeeze-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 12:23:25 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b68f1da577aea21f99b71705deac4019cb63a32e * md5sum 5a42154b9a446f58fb36cee26e22dc71 You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRrdw0AAoJEIXCXpWhbrlNG6MIAIe90A+hMsGpXHTKHeAs6+x6 PpjZf+9j3Dp5OcGExiqrkur6wbCvSzctBIQGx/eowLBUDZfP5qP6L7GHKgXJBF4z AeeEtesu8ZRSced7AHXnDixwisk0vnWQQJu+CjiQnesM4DwJAtFToUiBRD5Qn24p MnvegaQBzLX8KKDo5rQCcR82J+m2P5L5fgxqvpNb6lqdizXuOVHQCZq9xMK+4KGb 6snzbhCpmuuyYYk+Lj6wb2NAWk6+RE6XT27EMulhap2Boz3Ay8cmw57zY/Y+ay0S I1f6LincUqOTHn3lv4uJ27QuuzUPpkJqlmC/LovVQ497mjtTHWOF1/ZXOeqvfIM= =Qtp9 -----END PGP SIGNATURE-----